Incased compressor



Oct. 21 Ei3@, J. F. JOHNSON I 1,778,719

INCASED COMPRESSOR Fil ed May 17, 1928 INVENTOR.

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Patented a. 21, 1930' UNITED. STATES" PATENT OFFICE I JOHN F. JOHNSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB, BY MESN'E AS-= SIGNMENTS, TO JULIUS F. HOLMES, OF NEW YORK, N. Y.

INCASEID COMPRESSOR Application filed May 17, 1928. Serial No. 278,427.

This invention relates to inclosed gas comressors and particularly to compressors used or compressin the gaseous and li uid agents, such as t e gasified working fiui' s in mechanical refrigerating systems.

' The object of the invention is to provide an improved construction and arrangement of parts which is eflicient, economical and readily manufactured.

More specifically an object of the invention is to provide an lmproved arrangement for compressors submerged in abath of the fluid agents being pumped, which is adapted to insure an even and nonulsating discharge of the agents discharged rom the compressor and thereby avoid causing'the casing to vibrate or otherwise produce undue noise.

Another object of the invention is to provide an improved discharge nozzle for rotary submerged compressors when employed in the refrigerating system of the household variety of refrigerator.

Other objects of the invention will in part be obvious and will in part appearherein- 5 after.

The invention accordingly comprises the that'thc discharge therefrom is at an angle to features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and-the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description 3.5 taken in connection with the accompanying drawing, in which:

Fig. 1 is a fragmentary vertical sectional view showing an incased submerged compressor constructed in accordance with the inven- 40 tion; and I Figs. 2,3 and 4 show details in the construction of" the exhaust nozzle employed in connection with. the invention.

Referring now to the drawings and particularly to Fig. 1, 10 represents a main plate or wall, which is vertically disposedand has secured at one side a pump or compressor '11, the latter being shown as of the rotary type having a driving shaft 12 projecting through the wall. 10 to drive the gas-compressing rotor 13 that is of any convenient type, for example, the sliding vane type. This pump is submerged in a fluid bath containing lubricant, the upper. lever of which is indicated at 14, the fluid bath being maintained about the pump by a suitable receptacle, here shown as casing 15. The circulation of the lubricant c to the moving parts of the pump is achieved by means of the pipe connection 16, which supplies the lubricant to a chamber at the end of the driving shaft, from whenceit is supplied to the Working parts by suitable passages. The circulation of the lubricant and the means employed to that end, however, comprises no part of the present invention.

The pump has a discharge passage in a hub indicated at 18, to which is connected the vertically-extending discharge nozzle 17. This nozzle is arranged to discharge above the liquid level'at 14 and has its orifice so positioned I lateral component over the surface of the fluid in the casing. The lateral component is preferably materially greater than the vertical component so that the gas does not impinge with great force against the wall of the easing 15. The orientation of the plane of the opening with respect to the casing 15 is not left to random, but is so oriented as to face toward the main wall 10,. As the main wall 10 is the most distant of the surrounding. walls, it is seen that this arrangement we no ill when normally discharging compressed gas therefrom, the nozzle is provided with screen 19 against which the globules strike and are broken up into much liner particles, so that if anything, only a fine spray is thrown out from the nozzle upon the fluid surface in front of it. fit is desired that this screen shall be oi? a mesh sufficiently line to break up the average liquid articles having material momentum issuing therefrom. Where ethyl chloride and a mineral oil are the chief constituents of the and vapor being discharged from the nozzle, it is seen that globules oil are frequently ejected from the nozzle 17. it is desirable in such instances that the mesh of the screen over the orifice of the nozzle be of a mesh at least 100, (i. e. one hundred openings per linear inch). The screen 19 is brazed or otherwise conveniently secured to the nozzle.

In operation the pump or compressor embodying the present improvements has an in take connection 20 and an outlet connection 21, the latter communicating with the space above the liquid level in the casing 1 R0- tary pumps of the type here shown runnormally at a relatively high speed, for example, at a speed of 1700 revolutions per minute; consequently the gas discharged from the nozzle 17, which is relatively highly c0mpessed, is discharged in a space in the casing 18 above the liquid level ata relativelyhigh velocity. Liquid particles or globules discharged from the nozzle 17 are by reason of the screen caught and permitted to issue, if at all, in a direction substantially normal to the surface of the screen. In consequence it is seen that these projected particles issue at such an angle that they have a relatively small component of force impinging directly against the inner wall of the casing 15. Thus, the periodic application of any substantial force to the interior wall of the casing which would tend to produce vibration is avoided. A relatively quietly operating pump is thus achieved.

Since certain changes may be made in the aboveconstruction and different embodiments of the invention could be made with out departing from the scope thereof, it is mtended that all matter contained in the above description or shown in the accompanymg drawing shall be interpreted as illustrative and not in a limiting sense. I

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In an incased compressor-structure, the combination comprising a supporting wall. a casing capable. of vibration secured to said well, a compressor within said casing adapted meagre to be submerged in working fluid and having a discharge opening below the liquid level and directed to discharge directly against the vibratory portion of said casing, and discharge nozzle disposed in said opening having an orifice above the liquid level o f said working fluid, said orifice being arranged to open laterally above the liquid surface, whereby the discharge from orifice is projected away from vibratory portion and in a direction having lateral ccmpon Y oi": motion over the surface oi said worlii fluid.

2. In an incased ccmpressor-structure, the combination comprisin supporting wall, a casing capable of vibr scared to wall, a rotary compressor within said casi secured to said wall and adaptedto be submerged in working fluid, said compressor having a discharge opening positioned greater distance from said wall thanifrom any portion of the surrounding casing, said opening being below the liquid level and directed to discharge vertically upwards against the vibratory portion of said casing, and a discharge nozzle in said opening having an orifice above the liquid level of said worlo ing fluid and disposed in a plane at an angle to the vertical, said plane being oriented so as to project the discharge in a direction away from said vibratory portion and having lateral components operative over a relatively great extent of liquid surface.

3. In an incas d compressor-structure, the combination comprising a supporting wall, a casing capable of vibration secured to said wall, a rotary compressor within said casing secured to said wall and adapted to be sub merged in working fluid. said compressor having a discharge opening positioned a greater distance from said wall than from any portion of the surrounding casing, said opening being below the liquid level and di rected todischarge vertically upwards against the vibratory portion of said casing, a discharge nozzle disposed in said opening having an orifice above the liquid level of said working fluid, said orifice being in a plane at an angle to the vertical and oriented so that said dischargeis projected away from the vibratory portion of said casing toward said wall, and means secured in the orifice of said nozzle for reducing the force and size of globules projected therethrough. 4. In an incased compressor-structure, the combination comprising a supporting wall, a casing capable of vibration secured to said wall, a rotary compressor within said casing secured to said wall and adapted to be submerged in working fluid, said compressor having a discharge opening positioned agreater distance from said well than from any portion of the surrounding casing, said opening being below the liquid level and dirooted to discharge vertically upwards,

, against the vibratory portion of said casing, a discharge nozzle isposed in said opening having an orifice above the liquid level of said working fluid, said orifice being in a plane at an angle to the ye'rtical and oriented so that said discharge is i orojected away from y the vibratory portion 0 

